Itineraries flown on 20+ days in the Jun 6 – Jul 31, 2026 schedule · each leg’s record Aug 2025 – Jul 2026

Take the nonstop: United TUS → IAH (2h 33m) reaches Houston on time 9 times in 10; the most reliable connection, American via Phoenix (4h 46m), 62%.

Nonstops (seasonal or thin)


United	TUS	IAH	2h 33m	90%	0.8%	719	Flying now

Best connections, one ticket

Most reliable Quickest (80%+ on time)

Ranked by chance you reach Houston on time. Total trip = scheduled departure to arrival, layover included (Houston is 2 h ahead of Tucson). Layovers up to 4 hours. Pick a connection for the details.


Delta Details →	TUS 06:20 → LAX 08:04DL 3502 · flown by SkyWest	1h 36m Los Angeles	LAX 09:40 → IAH 15:04DL 1143	6h 45m	98%	84%
Delta Details →	TUS 07:05 → SLC 10:11DL 3745 · flown by SkyWest	3h 34m Salt Lake City	SLC 13:45 → IAH 17:53DL 1299	8h 48m	100%	80%
Delta Details →	TUS 11:16 → SLC 14:17DL 3718 · flown by SkyWest	3h 28m Salt Lake City	SLC 17:45 → IAH 21:52DL 2514	8h 36m	99%	78%
United Details →	TUS 13:30 → DEN 16:39UA 2671	3h 49m Denver	DEN 20:28 → IAH 23:59UA 2419	8h 29m	97%	77%
United Details →	TUS 05:45 → DEN 08:38UA 2418	2h 56m Denver	DEN 11:34 → IAH 15:09UA 1599	7h 24m	100%	77%
American Details →	TUS 08:39 → PHX 09:37AA 4187 · flown by Envoy	2h 41m Phoenix	PHX 12:18 → IAH 16:59AA 640	6h 20m	99%	73%
American Details →	TUS 05:45 → PHX 06:36AA 2622	2h 18m Phoenix	PHX 08:54 → IAH 13:36AA 2710	5h 57m	100%	73%
Delta Details →	TUS 13:29 → ATL 20:11DL 937	2h 33m Atlanta	ATL 22:44 → IAH 23:56DL 1601	8h 27m	97%	71%
Tight connection: often missed
United Details →	TUS 09:04 → SFO 11:25UA 4683 · flown by SkyWest	50m San Francisco	SFO 12:15 → IAH 18:27UA 1387	7h 23m	50%	38%
American Details →	TUS 13:18 → DFW 17:50AA 2926	46m Dallas-Fort Worth	DFW 18:36 → IAH 19:54AA 1392	4h 36m	59%	28%

Same layover, different day-part

How often the first flight arrives too late to connect (45 min minimum), for one-ticket layovers of 45–80 minutes.

Morning

PHX · 1h 04m · leaves 10:13 16%

SFO · 50m · leaves 09:04 50%

Afternoon and evening

SFO · 1h 04m · leaves 15:28 21%

DFW · 46m · leaves 13:18 41%

Delays build through the day, so an afternoon first leg eats the layover. A short connection is fine early in the morning and a gamble later on.

Mixing airlines

One ticketMiss it and the airline rebooks you; bags go through. 45 min is enough.

Separate ticketsMiss it and you buy a new ticket. Re-check bags, clear security again: we require 90 min.


Southwest WN 860 TUS 06:45 → LAS United UA 1711 LAS 10:25 → IAH Connection details →	2h 25m	6h 55m	100%	91%
Southwest WN 2310 TUS 05:45 → SAN United UA 2165 SAN 10:13 → IAH Connection details →	3h 08m	7h 55m	98%	87%
Delta DL 3502 TUS 06:20 → LAX United UA 277 LAX 10:10 → IAH Connection details →	2h 06m	7h 20m	97%	85%

Rank all connections, any airlines →

Regional partners count as the airline that sells them: SkyWest flying Delta Connection is one Delta ticket.

How these are worked out. Makes the connection: share of the last year’s flights where the first flight arrived with at least 45 minutes to spare (90 on separate tickets). Arrives on time: first flight not cancelled × connection made × second flight not cancelled and arriving within 15 minutes. Not yet counted: the second flight also leaving late (which helps), gate-to-gate distance at the hub, and rebooking after a missed connection.

About this data: US DOT on-time records, Aug 2025 – Jul 2026, all US airlines; regional flights count under the airline that sells them. Schedules (which flights and connections exist, and their times) are as of Jun 6 – Jul 31, 2026; seasonal flights outside that window aren’t ranked. Rebuilt monthly. JSON